Question

我正在使用网络服务而且出乎意料地突然失败并出现以下错误：

System.InvalidOperationException was caught
  Message="No corresponding start element is open."
  Source="mscorlib"

正确调用webservice并使用有效的xml返回正常响应（使用fiddler检查）。

我有一个hunge我在我生成的soap客户端的某个地方缺少一个数据元素但是不知道从哪里开始，因为我无法进入自动生成的soap客户端代码..

经过几个小时的浪费，我希望有人可以帮我解决如何开始排除故障的问题.. 有没有办法可以进入自动生成的soap客户端代码？ 我可以采取任何其他方法来确定哪些是错的？

我正在开发VS2008 SP1。自动生成的代码具有运行时版本：2.0.50727.3634

生成的代码位于类库中，并从控制台应用程序调用。对于服务绑定，以下内容已从控制台应用程序添加到app.config中：

  <system.serviceModel>
   <bindings>
    <basicHttpBinding>
      <binding name="OrderServiceSoap" closeTimeout="00:01:00" openTimeout="00:01:00"
          receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"
          bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
          maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
          messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
          useDefaultWebProxy="true">
        <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
            maxBytesPerRead="4096" maxNameTableCharCount="16384" />
        <security mode="None">
          <transport clientCredentialType="None" proxyCredentialType="None"
              realm="" />
          <message clientCredentialType="UserName" algorithmSuite="Default" />
        </security>
      </binding>
    </basicHttpBinding>
  </bindings>
  <client>
    <endpoint address="http://www.acdc.com/services/order.asmx"
        binding="basicHttpBinding" bindingConfiguration="OrderServiceSoap"
        contract="MLOrderServiceReference.OrderServiceSoap" name="OrderServiceSoap" />
  </client>
  </system.serviceModel>

这是我错误的堆栈跟踪：

 System.InvalidOperationException was caught
  Message="No corresponding start element is open."
  Source="mscorlib"
  StackTrace:
 Server stack trace: 
  at System.Xml.XmlBaseReader.ReadEndElement()
   at System.ServiceModel.Channels.Message.ReadFromBodyContentsToEnd(XmlDictionaryReader reader, EnvelopeVersion envelopeVersion)
   at System.ServiceModel.Channels.Message.ReadFromBodyContentsToEnd(XmlDictionaryReader reader)
   at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeBodyContents(Message message, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeReply(Message message, Object[] parameters)
   at System.ServiceModel.Dispatcher.ProxyOperationRuntime.AfterReply(ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)\r\n\r\nException rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at DS.ACDC.AppService.MLOrderServiceReference.OrderServiceSoap.GetOrderDetail(Int32 ClientId, Int32 OrderId)
   at DS.ACDC.AppService.MLOrderServiceReference.OrderServiceSoapClient.GetOrderDetail(Int32 ClientId, Int32 OrderId) in C:\\localdata\\ML\\ACDC\\DS.ACDC.AppService\\Service References\\MLOrderServiceReference\\Reference.cs:line 4151
   at DS.ACDC.AppService.OrderService.getOrder(CISmapping CISdetails) in C:\\localdata\\ML\\ACDC\\DS.ACDC.AppService\\OrderService.cs:line 123

修改它似乎与使用WCF服务引用而不是良好的旧Web引用有关。不知何故，当XmlSerializer工作时，DataContractSerializer会搞乱。

Answer 1

好的，以防其他人遇到同样的问题我在这里回答我自己的问题..

“在何处/如何开始调试外部Web服务”这一问题的答案是将以下内容添加到配置文件中：

   <system.diagnostics>
     <switches>
       <add name="XmlSerialization.Compilation" value="1" />
     </switches>
   </system.diagnostics>

错误“没有相应的启动元素打开”。在调用webservice时：从哪里开始？

1 个答案: